This may be a question so dumb no one has ever asked but where is the intercom button that the manual so often refers to on this phone???

button #1

The Intercom button can be on any of the ten programmable buttons on the right side of the phone. It will be the one programmed as ##XXX (XXX = the port number) in Prog 39 which most techs will program on the very bottom right button.

Button 1 is closest to the Hold button on all dkt model and is usually where the primary DN or intercom button is programmed. But, the intercom or PDN can be located on any of the flex buttons even on a DK.

ahhh the good old days DKT2000 series handsets